/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2020 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#ifndef _U2_SUGGESTCOMPLETER_H_
#define _U2_SUGGESTCOMPLETER_H_

#include <QLineEdit>

#include <U2Core/global.h>

class QTreeWidget;

namespace U2 {

class U2GUI_EXPORT CompletionFiller {
public:
    virtual ~CompletionFiller() {};
    virtual QStringList getSuggestions(const QString &str) = 0;
    virtual QString finalyze(const QString &editorText, const QString &suggestion) = 0;
};

class U2GUI_EXPORT MSACompletionFiller : public CompletionFiller {
public:
    MSACompletionFiller()
        : CompletionFiller(), seqNameList(QStringList()), defaultValue("") {};
    MSACompletionFiller(QStringList &_seqNameList, const QString &defVal = "")
        : CompletionFiller(), seqNameList(_seqNameList), defaultValue(defVal) {};

    QStringList getSuggestions(const QString &str);
    void updateSeqList(QStringList list) {
        seqNameList = list;
    };
    QString finalyze(const QString &editorText, const QString &suggestion);

private:
    QStringList seqNameList;
    const QString defaultValue;
};

class U2GUI_EXPORT BaseCompleter : public QObject {
    Q_OBJECT
public:
    BaseCompleter(CompletionFiller *filler, QLineEdit *parent = 0);
    ~BaseCompleter();
    bool eventFilter(QObject *obj, QEvent *ev);
    void showCompletion(const QStringList &choices);
    int getLastChosenItemIndex() const;

signals:
    void si_editingFinished();
    void si_completerClosed();

protected slots:
    void doneCompletion();
    void sl_textChanged(const QString &);

private:
    CompletionFiller *filler;
    QLineEdit *editor;
    QTreeWidget *popup;
    int lastChosenItemIndex;
};

}    // namespace U2

#endif    // _U2_URLLINEEDIT_H_
